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#include "fitz_base.h"
#include "fitz_stream.h"
fz_error
fz_newrld(fz_filter **fp, fz_obj *params)
{
FZ_NEWFILTER(fz_filter, f, rld);
return fz_okay;
}
void
fz_droprld(fz_filter *rld)
{
}
fz_error
fz_processrld(fz_filter *filter, fz_buffer *in, fz_buffer *out)
{
int run, i;
unsigned char c;
while (1)
{
if (in->rp == in->wp)
{
if (in->eof)
{
return fz_iodone;
}
return fz_ioneedin;
}
if (out->wp == out->ep)
return fz_ioneedout;
run = *in->rp++;
if (run == 128)
{
return fz_iodone;
}
else if (run < 128) {
run = run + 1;
if (in->rp + run > in->wp) {
in->rp --;
return fz_ioneedin;
}
if (out->wp + run > out->ep) {
in->rp --;
return fz_ioneedout;
}
for (i = 0; i < run; i++)
*out->wp++ = *in->rp++;
}
else if (run > 128) {
run = 257 - run;
if (in->rp + 1 > in->wp) {
in->rp --;
return fz_ioneedin;
}
if (out->wp + run > out->ep) {
in->rp --;
return fz_ioneedout;
}
c = *in->rp++;
for (i = 0; i < run; i++)
*out->wp++ = c;
}
}
}
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